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矿石中微量希土总量的分析,近年来多采用在强碱性溶液中加入三乙醇胺分离铁、锰等离子,然后以PMBP-苯萃取希土,偶氮胂Ⅲ光度测定,但是当磷、钙含量均高时,或者磷、钛共存时能使分析结果严重偏低。为了适用于测定磷灰石中微量希土总量,我们经试验拟定了在强碱性溶液中加入三乙醇胺、过氧化氢分离钛,以消除磷、钛共存的影响;在萃取时加入铜试剂以消除磷、钙共存的影响。本
In recent years, the use of triethanolamine in strong alkaline solution to separate iron and manganese ions, and then PMBP-benzene extraction of rare earth, arsenazo III photometric determination, but when phosphorus, calcium When the content is high, or when phosphorus and titanium coexist, the analysis result will be seriously low. In order to determine the total amount of trace amounts of apatite in apatite, we determined that the addition of triethanolamine in strong alkaline solution and the separation of titanium by hydrogen peroxide in order to eliminate the coexistence of phosphorus and titanium. When adding copper reagent To eliminate the impact of phosphorus and calcium coexist. this